avmd_test.pl

FS-11120 Handle invalid configs for avmd This makes sure avmd session uses default values for global settings if configuration parameters are invalid or missing. Also add more printing for avmd. Avmd will now report media bug direction READ_REPLACE/WRITE_REPLACE it has been started on, and each frame it is processing if debug==1. This also fixes confusing log on session stopped reported in FS-10732.